21997

Number 21997 is an odd five-digits prime number and natural number following 21996 and preceding 21998.

Properties of the number 21997

Nominal	21997
Cardinal	twenty-one thousand nine hundred ninety-seven
Cardinal twenty-one thousand nine hundred ninety-seven
Ordinal	21,997th
Number of digits	5
Sum of digits	28
Product of digits	1134
Number parity	Odd

Previous number is 21996

Next number is 21998

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Prime Factorization of 21997

Prime factorization	21997
Prime factors	21997
Number of distinct prime factors ω(n)	1
Total number of prime factors Ω(n)	1
Sum of prime factors	21997
Product of prime factors	21997

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Divisors of 21997

List of proper divisors	1
List of all dividers	1, 21997
Number of divisors d(n)	2
Sum of all divisors σ(n)	21998
Aliquot sum	1
21997 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 21996.

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Prime numbers

Is 21997 a prime number?	Yes
Is 21997 a semiprime number?	No
Is 21997 a Chen prime number?	Yes
Is 21997 a Mersenne prime number?	No

Previous prime is 21991

Next prime is 22003

Calculation was done in 0.3108260632 seconds

Sequences

Is 21997 a Catalan number?	No
Is 21997 a Fibonacci number?	No
Is 21997 a Idoneal number?	No

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Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.

21997 is not a Happy number

21997 is not a Humble number

21997 is not a Münchhausen number

21997 is not a Perfect number

21997 is not a Perfect square

21997 is not a Palindrome

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Numeric Bases of 21997

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.

Base	System	Value
2	Binary	101010111101101₂
3	Ternary	1010011201₃
4	Quaternary	11113231₄
5	Quinary	1200442₅
6	Senary	245501₆
7	Septenary	121063₇
8	Octal	52755₈
9	Nonary	33151₉
10	Decimal	21997
12	Duodecimal	10891₁₂
16	Hexadecimal	55ed₁₆
20	Vigesimal	2ejh₂₀
36	Base36	gz1₃₆
60	Sexagesimal	66b₆₀

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Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.

Square of 21997 (n²)	483868009
Cube of 21997 (n³)	10643644593973
Square root of 21997	148.31385639919
Natural Logarithm (ln) of 21997	9.9986613594057
Decimal Logarithm (log) of 21997	4.3423634548092

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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.

Sine of 21997	-0.41847033141874
Cosecant of 21997	-2.3896556695183
Cosine of 21997	0.90823046729467
Secant of 21997	1.1010421209263
Tangent of 21997	-0.46075346125002
Cotangent of 21997	-2.1703580853999

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Number parity

Parity is the property of an integer of whether it is even or odd.

Is 21997 an Even Number?

Is 21997 an Odd Number?

Yes, the number 21997 is an odd number.

Total number of all odd numbers from 1 to 21997 is 10999

Sum of all the odd numbers from 1 to 21997 are 120978001

The sum of all odd numbers is a perfect square: 120978001 = 10999

An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.

Previous odd number is 21995

Next odd number is 21999

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Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".

The spelling of 21997 in words is "twenty-one thousand nine hundred ninety-seven", meaning that:

21997 is not an aban number (as it contains the letter a)

21997 is not an eban number (as it contains the letter e)

21997 is not an iban number (as it contains the letter i)

21997 is not an oban number (as it contains the letter o)

21997 is not a tban number (as it contains the letter t)

21997 is not an uban number (as it contains the letter u)

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Numeral systems

How to write 21997 in other number systems?

Bengali numerals	২১৯৯৭
Eastern Arabic numerals	٢١٬٩٩٧
Hieroglyphs numeralsused in Ancient Egypt	𓂭𓂭𓆼𓍪𓎎𓐀
Khmer numerals	២១៩៩៧
Japanese numerals	二万千九百九十七
Roman numerals	n/a
Thai numerals	๒๑๙๙๗

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Translation

How do you say 21997 in 38 different languages?

Arabic	واحد و عشرون ألف و تسعة مائة و سبعة و تسعون
Croatian	dvadeset i jedna tisuća devetsto devedeset i sedam
Czech	dvacet jedna tisíc devět set devadesát sedm
Danish	en og tyve tusinde ni hundrede syv og halvfems
Dutch	éénentwintigduizend negenhonderdzevenennegentig
Estonian	akpe blaeve vɔ ɖekɛ alafa asieke blaasieke vɔ adre
Faroese	tjúgoeitt tusin og níggjuhundraðognítisjey
Filipino	dalawáng pû’t isáng libó’t siyám na daán at siyám na pû’t pitó
Finnish	kaksikymmentäyksituhattayhdeksänsataayhdeksänkymmentäseitsemän
French	vingt et un mille neuf cent quatre-vingt-dix-sept
Greek	είκοσι μία χίλιάδες εννιακόσια εννενήντα επτά
German	einundzwanzigtausendneunhundertsiebenundneunzig
Hebrew	עשרים ואחד אלף תשע מאות תשעים ושבע
Hindi	इक्कीस हज़ार नौ सौ सत्तानबे
Hungarian	huszonegyezerkilencszázkilencvenhét
Icelandic	tuttugu og eitt þúsund og níuhundrað og níutíu og sjó
Indonesian	dua puluh satu ribu sembilan ratus sembilan puluh tujuh
Italian	ventunomilanovecentonovantasette
Japanese	二万千九百九十七
Korean	이만 천구백구십칠
Latvian	divdesmit viens tūkstoši deviņsimt deviņdesmit septiņi
Lithuanian	dvidešimt vienas tūkstantis devyni šimtai devyniasdešimt septyni
Norwegian	tjueett tusen ni hundre og nittisju
Persian	بیست و یک هزار و نهصد و نود و هفت
Polish	dwadzieścia jeden tysięcy dziewięćset dziewięćdziesiąt siedem
Portuguese	vinte e um mil novecentos e noventa e sete
Romanian	douăzeci şi una mii nouă sute nouăzeci şi şapte
Russian	двадцать одна тысяча девятьсот девяносто семь
Serbian	двадесет и једна хиљада деветсто деведесет и седам
Slovak	dvadsaťjedna tisíc deväťsto deväťdesiatsedem
Slovene	dvaset ena tisuću devetsto devetdeset sedem
Spanish	veintiún mil novecientos noventa y siete
Swahili	elfu ishirini na moja, mia tisa na tisini na saba
Swedish	tjugoentusenniohundranittiosju
Thai	สองหมื่นหนึ่งพันเก้าร้อยเก้าสิบเจ็ด
Turkish	yirmi bir bin dokuz yüz doksan yedi
Ukrainian	двадцять одна тисяча девʼятсот девʼяносто сім
Vietnamese	hai mươi mốt nghìn chín trăm chín mươi bảy

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Miscellaneous

Number 21997 reversed	79912
Unicode Character	U+55ED	嗭
Unix Timestamp	Thu, 01 Jan 1970 06:06:37 +0000

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